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SIR to YSM: distance & flight time
Sion (Sion Airport) → Fort Smith (Fort Smith Airport)
4,343 mi
6,989 km · 3,774 nm
8h 59m
estimated nonstop flight time
-8h
time difference · heading northwest
See live SIR→YSM fares Phone-only fares on this route — call free
Flight time details
4,343 miles nonstop takes roughly 8h 59m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 8-hour time set-back when reading arrival times on your ticket.
The two airports
- SIR — Sion Airport · Sion, Switzerland
- YSM — Fort Smith Airport · Fort Smith, Canada
Distances are great-circle ("as the crow flies") — the same basis airlines use for frequent-flyer miles.
Alternate airports can cut this fare
Flying from or into a nearby airport is the #1 trick our agents use to beat online prices. Call and we'll compare every combination on one call.
Near SIR
- AOT · Aosta Airport33 mi away
- QLS · Lausanne-Blécherette Airport41 mi away
- ZIN · Interlaken Air Base41 mi away
- MVV · Megève Airport43 mi away
Near YSM
- YPY · Fort Chipewyan Airport92 mi away
- YFR · Fort Resolution Airport99 mi away
- YBE · Uranium City Airport125 mi away
- YHY · Hay River / Merlyn Carter Airport142 mi away
Frequently asked questions
How far is SIR from YSM?
The flight distance from Sion (SIR) to Fort Smith (YSM) is 4,343 miles (6,989 km, 3,774 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SIR to YSM?
A nonstop flight takes about 8h 59m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
What is the time difference between Sion and Fort Smith?
Fort Smith is 8 hours behind Sion.
What is the cheapest way to fly from SIR to YSM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SIR–YSM that never appear on search engines, with no booking fees.